/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC H5F_init_super_interface
/* Packages needed by this file... */
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
#include "H5Iprivate.h" /* IDs */
#include "H5Pprivate.h" /* Property lists */
/* PRIVATE PROTOTYPES */
/*--------------------------------------------------------------------------
NAME
H5F_init_super_interface -- Initialize interface-specific information
USAGE
herr_t H5T_init_super_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines. (Just calls
H5F_init_iterface currently).
--------------------------------------------------------------------------*/
static herr_t
H5F_init_super_interface(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_init_super_interface)
FUNC_LEAVE_NOAPI(H5F_init())
} /* H5F_init_super_interface() */
/*-------------------------------------------------------------------------
* Function: H5F_read_superblock
*
* Purpose: Reads the superblock from the file or from the BUF. If
* ADDR is a valid address, then it reads it from the file.
* If not, then BUF must be non-NULL for it to read from the
* BUF.
*
* Return: Success: SUCCEED
* Failure: FAIL
*
* Programmer: Bill Wendling
* wendling@ncsa.uiuc.edu
* Sept 12, 2003
*
* Modifications:
* Raymond Lu
* May 24, 2005
* Started to check if driver(only family and multi drivers)
* matches driver information saved in the superblock. Wrong
* driver will result in a failure.
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_read_superblock(H5F_t *f, hid_t dxpl_id, H5G_entry_t *root_ent, haddr_t addr, uint8_t *buf, size_t buf_size)
{
haddr_t stored_eoa; /*relative end-of-addr in file */
haddr_t eof; /*end of file address */
uint8_t *q; /*ptr into temp I/O buffer */
size_t sizeof_addr = 0;
size_t sizeof_size = 0;
const size_t fixed_size = 24; /*fixed sizeof superblock */
unsigned sym_leaf_k = 0;
size_t variable_size; /*variable sizeof superblock */
unsigned btree_k[H5B_NUM_BTREE_ID]; /* B-tree internal node 'K' values */
H5F_file_t *shared = NULL; /* shared part of `file' */
H5FD_t *lf = NULL; /* file driver part of `shared' */
uint8_t *p; /* Temporary pointer into encoding buffers */
uint8_t *start_p; /* Start of encoding buffers */
unsigned i; /* Index variable */
unsigned chksum; /* Checksum temporary variable */
size_t driver_size; /* Size of driver info block, in bytes */
char driver_name[9]; /* Name of driver, for driver info block */
unsigned super_vers; /* Super block version */
unsigned freespace_vers; /* Freespace info version */
unsigned obj_dir_vers; /* Object header info version */
unsigned share_head_vers; /* Shared header info version */
uint8_t sbuf[H5F_SUPERBLOCK_SIZE]; /* Local buffer */
H5P_genplist_t *c_plist; /* File creation property list */
herr_t ret_value = SUCCEED;
/* Decoding */
FUNC_ENTER_NOAPI(H5F_read_superblock, FAIL)
/* Short cuts */
shared = f->shared;
lf = shared->lf;
/* Get the shared file creation property list */
if (NULL == (c_plist = H5I_object(shared->fcpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
/* Read the superblock if it hasn't been read before. */
if (addr == HADDR_UNDEF) {
if (HADDR_UNDEF == (shared->super_addr=H5F_locate_signature(lf,dxpl_id)))
HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to find file signature")
} else {
shared->super_addr = addr;
}
if (!buf) {
start_p = p = sbuf;
buf_size=sizeof(sbuf);
if (H5FD_set_eoa(lf, shared->super_addr + fixed_size) < 0 ||
H5FD_read(lf, H5FD_MEM_SUPER, dxpl_id, shared->super_addr, fixed_size, p) < 0)
HGOTO_ERROR(H5E_FILE, H5E_READERROR, FAIL, "unable to read superblock")
} else {
start_p = p = buf;
}
/* Signature, already checked */
p += H5F_SIGNATURE_LEN;
/* Superblock version */
super_vers = *p++;
if (super_vers > HDF5_SUPERBLOCK_VERSION_MAX)
HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad superblock version number")
if (H5P_set(c_plist, H5F_CRT_SUPER_VERS_NAME, &super_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set superblock version")
/* Freespace version */
freespace_vers = *p++;
if (HDF5_FREESPACE_VERSION != freespace_vers)
HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad free space version number")
if (H5P_set(c_plist, H5F_CRT_FREESPACE_VERS_NAME, &freespace_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to free space version")
/* Root group version number */
obj_dir_vers = *p++;
if (HDF5_OBJECTDIR_VERSION != obj_dir_vers)
HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad object directory version number")
if (H5P_set(c_plist, H5F_CRT_OBJ_DIR_VERS_NAME, &obj_dir_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set object directory version")
/* Skip over reserved byte */
p++;
/* Shared header version number */
share_head_vers = *p++;
if (HDF5_SHAREDHEADER_VERSION != share_head_vers)
HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad shared-header format version number")
if (H5P_set(c_plist, H5F_CRT_SHARE_HEAD_VERS_NAME, &share_head_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set shared-header format version")
/* Size of file addresses */
sizeof_addr = *p++;
if (sizeof_addr != 2 && sizeof_addr != 4 &&
sizeof_addr != 8 && sizeof_addr != 16 && sizeof_addr != 32)
HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad byte number in an address")
if (H5P_set(c_plist, H5F_CRT_ADDR_BYTE_NUM_NAME,&sizeof_addr) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set byte number in an address")
shared->sizeof_addr = sizeof_addr; /* Keep a local copy also */
/* Size of file sizes */
sizeof_size = *p++;
if (sizeof_size != 2 && sizeof_size != 4 &&
sizeof_size != 8 && sizeof_size != 16 && sizeof_size != 32)
HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad byte number for object size")
if (H5P_set(c_plist, H5F_CRT_OBJ_BYTE_NUM_NAME, &sizeof_size) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set byte number for object size")
shared->sizeof_size = sizeof_size; /* Keep a local copy also */
/* Skip over reserved byte */
p++;
/* Various B-tree sizes */
UINT16DECODE(p, sym_leaf_k);
if (sym_leaf_k == 0)
HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, FAIL, "bad symbol table leaf node 1/2 rank")
if (H5P_set(c_plist, H5F_CRT_SYM_LEAF_NAME, &sym_leaf_k) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set rank for symbol table leaf nodes")
shared->sym_leaf_k = sym_leaf_k; /* Keep a local copy also */
/* Need 'get' call to set other array values */
if (H5P_get(c_plist, H5F_CRT_BTREE_RANK_NAME, btree_k) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get rank for btree internal nodes")
UINT16DECODE(p, btree_k[H5B_SNODE_ID]);
if (btree_k[H5B_SNODE_ID] == 0)
HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, FAIL, "bad 1/2 rank for btree internal nodes")
/*
* Delay setting the value in the property list until we've checked
* for the indexed storage B-tree internal 'K' value later.
*/
/* File consistency flags. Not really used yet */
UINT32DECODE(p, shared->consist_flags);
assert(((size_t)(p - start_p)) == fixed_size);
/* Decode the variable-length part of the superblock... */
variable_size = (super_vers>0 ? 4 : 0) + /* Potential indexed storage B-tree internal 'K' value */
H5F_SIZEOF_ADDR(f) + /*base addr*/
H5F_SIZEOF_ADDR(f) + /*global free list*/
H5F_SIZEOF_ADDR(f) + /*end-of-address*/
H5F_SIZEOF_ADDR(f) + /*reserved address*/
H5G_SIZEOF_ENTRY(f); /*root group ptr*/
assert(fixed_size + variable_size <= buf_size);
/* The buffer (buf) is either passed in or the "local_buf" variable now */
if(!buf) {
if (H5FD_set_eoa(lf, shared->super_addr + fixed_size+variable_size) < 0 ||
H5FD_read(lf, H5FD_MEM_SUPER, dxpl_id, shared->super_addr + fixed_size,
variable_size, p) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to read superblock")
} /* end if */
/*
* If the superblock version # is greater than 0, read in the indexed
* storage B-tree internal 'K' value
*/
if (super_vers > 0) {
UINT16DECODE(p, btree_k[H5B_ISTORE_ID]);
p += 2; /* reserved */
}
else
btree_k[H5B_ISTORE_ID] = HDF5_BTREE_ISTORE_IK_DEF;
/* Set the B-tree internal node values, etc */
if (H5P_set(c_plist, H5F_CRT_BTREE_RANK_NAME, btree_k) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set rank for btree internal nodes")
HDmemcpy(shared->btree_k, btree_k, sizeof(unsigned) * (size_t)H5B_NUM_BTREE_ID); /* Keep a local copy also */
H5F_addr_decode(f, (const uint8_t **)&p, &shared->base_addr/*out*/);
H5F_addr_decode(f, (const uint8_t **)&p, &shared->freespace_addr/*out*/);
H5F_addr_decode(f, (const uint8_t **)&p, &stored_eoa/*out*/);
H5F_addr_decode(f, (const uint8_t **)&p, &shared->driver_addr/*out*/);
if (H5G_ent_decode(f, (const uint8_t **)&p, root_ent/*out*/) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to read root symbol entry")
/*
* Check if superblock address is different from base address and
* adjust base address and "end of address" address if so.
*/
if (!H5F_addr_eq(shared->super_addr,shared->base_addr)) {
/* Check if the superblock moved earlier in the file */
if (H5F_addr_lt(shared->super_addr, shared->base_addr))
stored_eoa -= (shared->base_addr - shared->super_addr);
else
/* The superblock moved later in the file */
stored_eoa += (shared->super_addr - shared->base_addr);
shared->base_addr = shared->super_addr;
} /* end if */
/* Compute super block checksum */
assert(sizeof(chksum) == sizeof(shared->super_chksum));
for (q = (uint8_t *)&chksum, chksum = 0, i = 0; i < fixed_size + variable_size; ++i)
q[i % sizeof(shared->super_chksum)] ^= start_p[i];
/* Set the super block checksum */
shared->super_chksum = chksum;
/* This step is for h5repart tool only. If user wants to change file driver from
* family to sec2 while using h5repart, set the driver address to undefined to let
* the library ignore the family driver information saved in the superblock.
*/
if(shared->fam_to_sec2)
shared->driver_addr = HADDR_UNDEF;
/* Decode the optional driver information block */
if (H5F_addr_defined(shared->driver_addr)) {
haddr_t drv_addr = shared->base_addr + shared->driver_addr;
uint8_t dbuf[H5F_DRVINFOBLOCK_SIZE]; /* Local buffer */
size_t dbuf_size; /* Size available for driver info */
const uint8_t *driver_p; /* Remember beginning of driver info block */
if(!buf) {
driver_p = p = dbuf;
dbuf_size=sizeof(dbuf);
if (H5FD_set_eoa(lf, drv_addr + 16) < 0 ||
H5FD_read(lf, H5FD_MEM_SUPER, dxpl_id, drv_addr, (size_t)16, p) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to read driver information block")
} /* end if */
else {
driver_p = p;
dbuf_size=buf_size-(p-start_p);
} /* end else */
/* Version number */
if (HDF5_DRIVERINFO_VERSION != *p++)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "bad driver information block version number")
p += 3; /* reserved */
/* Driver info size */
UINT32DECODE(p, driver_size);
/* Driver name and/or version */
HDstrncpy(driver_name, (const char *)p, (size_t)8);
driver_name[8] = '\0';
p += 8; /* advance past name/version */
/* Read driver information and decode */
assert((driver_size + 16) <= dbuf_size);
if(!buf) {
if (H5FD_set_eoa(lf, drv_addr + 16 + driver_size) < 0 ||
H5FD_read(lf, H5FD_MEM_SUPER, dxpl_id, drv_addr+16, driver_size, p) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to read file driver information")
} /* end if */
/* Check if driver matches driver information saved. Unfortunately, we can't push this
* function to each specific driver because we're checking if the driver is correct.*/
if(!HDstrncmp(driver_name, "NCSAfami", 8) && HDstrcmp(lf->cls->name, "family"))
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "family driver should be used")
if(!HDstrncmp(driver_name, "NCSAmult", 8) && HDstrcmp(lf->cls->name, "multi"))
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "multi driver should be used")
if (H5FD_sb_decode(lf, driver_name, p) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to decode driver information")
/* Compute driver info block checksum */
assert(sizeof(chksum) == sizeof(shared->drvr_chksum));
for (q = (uint8_t *)&chksum, chksum = 0, i = 0; i < (driver_size + 16); ++i)
q[i % sizeof(shared->drvr_chksum)] ^= driver_p[i];
/* Set the driver info block checksum */
shared->drvr_chksum = chksum;
} /* end if */
/*
* The user-defined data is the area of the file before the base
* address.
*/
if (H5P_set(c_plist, H5F_CRT_USER_BLOCK_NAME, &shared->base_addr) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set usr block size")
/*
* Make sure that the data is not truncated. One case where this is
* possible is if the first file of a family of files was opened
* individually.
*/
if (HADDR_UNDEF == (eof = H5FD_get_eof(lf)))
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to determine file size")
#ifdef H5_HAVE_FPHDF5
if (!H5FD_is_fphdf5_driver(lf) || H5FD_fphdf5_is_captain(lf))
#endif /* !H5_HAVE_FPHDF5 */
if (eof < stored_eoa)
HGOTO_ERROR(H5E_FILE, H5E_TRUNCATED, FAIL, "truncated file")
/*
* Tell the file driver how much address space has already been
* allocated so that it knows how to allocate additional memory.
*/
if (H5FD_set_eoa(lf, stored_eoa) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to set end-of-address marker for file")
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5F_init_superblock
*
* Purpose: Allocates the superblock for the file and initializes
* information about the superblock in memory. Does not write
* any superblock information to the file.
*
* Return: Success: SUCCEED
* Failure: FAIL
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Sept 15, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
hsize_t
H5F_init_superblock(const H5F_t *f, hid_t dxpl_id)
{
hsize_t userblock_size = 0; /* Size of userblock, in bytes */
size_t superblock_size; /* Size of superblock, in bytes */
size_t driver_size; /* Size of driver info block (bytes)*/
unsigned super_vers; /* Super block version */
haddr_t addr; /* Address of superblock */
H5P_genplist_t *plist; /* Property list */
hsize_t ret_value;
/* Encoding */
FUNC_ENTER_NOAPI(H5F_init_superblock, UFAIL)
/* Get the shared file creation property list */
if (NULL == (plist = H5I_object(f->shared->fcpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, UFAIL, "not a property list")
/*
* The superblock starts immediately after the user-defined
* header, which we have already insured is a proper size. The
* base address is set to the same thing as the superblock for
* now.
*/
if(H5P_get(plist, H5F_CRT_USER_BLOCK_NAME, &userblock_size) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTGET, UFAIL, "unable to get user block size")
f->shared->super_addr = userblock_size;
f->shared->base_addr = f->shared->super_addr;
f->shared->consist_flags = 0x03;
/* Grab superblock version from property list */
if (H5P_get(plist, H5F_CRT_SUPER_VERS_NAME, &super_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, UFAIL, "unable to get super block version")
/* Compute the size of the superblock */
superblock_size=H5F_SIGNATURE_LEN /* Signature length (8 bytes) */
+ 16 /* Length of required fixed-size portion */
+ ((super_vers>0) ? 4 : 0) /* Version specific fixed-size portion */
+ 4 * H5F_sizeof_addr(f) /* Variable-sized addresses */
+ H5G_SIZEOF_ENTRY(f); /* Size of root group symbol table entry */
/* Compute the size of the driver information block. */
H5_ASSIGN_OVERFLOW(driver_size, H5FD_sb_size(f->shared->lf), hsize_t, size_t);
if (driver_size > 0)
driver_size += 16; /* Driver block header */
/*
* Allocate space for the userblock, superblock, and driver info
* block. We do it with one allocation request because the
* userblock and superblock need to be at the beginning of the
* file and only the first allocation request is required to
* return memory at format address zero.
*/
H5_CHECK_OVERFLOW(f->shared->base_addr, haddr_t, hsize_t);
addr = H5FD_alloc(f->shared->lf, H5FD_MEM_SUPER, dxpl_id,
((hsize_t)f->shared->base_addr + superblock_size + driver_size));
if (HADDR_UNDEF == addr)
HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, UFAIL,
"unable to allocate file space for userblock and/or superblock")
if (0 != addr)
HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, UFAIL,
"file driver failed to allocate userblock and/or superblock at address zero")
/*
* The file driver information block begins immediately after the
* superblock.
*/
if (driver_size > 0)
f->shared->driver_addr = superblock_size;
/* Return the size of the super block+driver info block */
ret_value=superblock_size+driver_size;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_init_superblock() */
/*-------------------------------------------------------------------------
* Function: H5F_write_superblock
*
* Purpose: Writes (and optionally allocates) the superblock for the file.
* If BUF is non-NULL, then write the serialized superblock
* information into it. It should be a buffer of size
* H5F_SUPERBLOCK_SIZE + H5F_DRVINFOBLOCK_SIZE or larger.
*
* Return: Success: SUCCEED
* Failure: FAIL
*
* Programmer: Bill Wendling
* wendling@ncsa.uiuc.edu
* Sept 12, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_write_superblock(H5F_t *f, hid_t dxpl_id, uint8_t *buf)
{
uint8_t sbuf[H5F_SUPERBLOCK_SIZE]; /* Superblock encoding buffer */
uint8_t dbuf[H5F_DRVINFOBLOCK_SIZE];/* Driver info block encoding buffer*/
uint8_t *p = NULL; /* Ptr into encoding buffers */
unsigned i; /* Index variable */
unsigned chksum; /* Checksum temporary variable */
size_t superblock_size; /* Size of superblock, in bytes */
size_t driver_size; /* Size of driver info block (bytes)*/
char driver_name[9]; /* Name of driver, for driver info block */
unsigned super_vers; /* Super block version */
unsigned freespace_vers; /* Freespace info version */
unsigned obj_dir_vers; /* Object header info version */
unsigned share_head_vers; /* Shared header info version */
H5P_genplist_t *plist; /* Property list */
herr_t ret_value = SUCCEED;
/* Encoding */
FUNC_ENTER_NOAPI(H5F_write_superblock, FAIL)
/* Get the shared file creation property list */
if (NULL == (plist = H5I_object(f->shared->fcpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
/* Grab values from property list */
if (H5P_get(plist, H5F_CRT_SUPER_VERS_NAME, &super_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get super block version")
if (H5P_get(plist, H5F_CRT_FREESPACE_VERS_NAME, &freespace_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get free space version")
if (H5P_get(plist, H5F_CRT_OBJ_DIR_VERS_NAME, &obj_dir_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get object directory version")
if (H5P_get(plist, H5F_CRT_SHARE_HEAD_VERS_NAME, &share_head_vers) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get shared-header format version")
/* Encode the file super block */
p = sbuf;
HDmemcpy(p, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN);
p += H5F_SIGNATURE_LEN;
*p++ = (uint8_t)super_vers;
*p++ = (uint8_t)freespace_vers;
*p++ = (uint8_t)obj_dir_vers;
*p++ = 0; /* reserved*/
*p++ = (uint8_t)share_head_vers;
assert (H5F_SIZEOF_ADDR(f) <= 255);
*p++ = (uint8_t)H5F_SIZEOF_ADDR(f);
assert (H5F_SIZEOF_SIZE(f) <= 255);
*p++ = (uint8_t)H5F_SIZEOF_SIZE(f);
*p++ = 0; /* reserved */
UINT16ENCODE(p, f->shared->sym_leaf_k);
UINT16ENCODE(p, f->shared->btree_k[H5B_SNODE_ID]);
UINT32ENCODE(p, f->shared->consist_flags);
/*
* Versions of the superblock >0 have the indexed storage B-tree
* internal 'K' value stored
*/
if (super_vers > 0) {
UINT16ENCODE(p, f->shared->btree_k[H5B_ISTORE_ID]);
*p++ = 0; /*reserved */
*p++ = 0; /*reserved */
}
H5F_addr_encode(f, &p, f->shared->base_addr);
H5F_addr_encode(f, &p, f->shared->freespace_addr);
H5F_addr_encode(f, &p, H5FD_get_eoa(f->shared->lf));
H5F_addr_encode(f, &p, f->shared->driver_addr);
if(H5G_ent_encode(f, &p, H5G_entof(f->shared->root_grp))<0)
HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to encode root group information")
H5_ASSIGN_OVERFLOW(superblock_size, p - sbuf, int, size_t);
/* Double check we didn't overrun the block (unlikely) */
assert(superblock_size <= sizeof(sbuf));
/* Encode the driver information block. */
H5_ASSIGN_OVERFLOW(driver_size, H5FD_sb_size(f->shared->lf), hsize_t, size_t);
if (driver_size > 0) {
driver_size += 16; /* Driver block header */
/* Double check we didn't overrun the block (unlikely) */
assert(driver_size <= sizeof(dbuf));
/* Encode the driver information block */
p = dbuf;
*p++ = HDF5_DRIVERINFO_VERSION; /* Version */
*p++ = 0; /* reserved */
*p++ = 0; /* reserved */
*p++ = 0; /* reserved */
/* Driver info size, excluding header */
UINT32ENCODE(p, driver_size - 16);
/* Encode driver-specific data */
if (H5FD_sb_encode(f->shared->lf, driver_name, dbuf + 16) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to encode driver information")
/* Driver name */
HDmemcpy(dbuf + 8, driver_name, (size_t)8);
} /* end if */
/* Compute super block checksum */
assert(sizeof(chksum) == sizeof(f->shared->super_chksum));
for (p = (uint8_t *)&chksum, chksum = 0, i = 0; i < superblock_size; ++i)
p[i % sizeof(f->shared->super_chksum)] ^= sbuf[i];
/* Compare with current checksums */
if (chksum != f->shared->super_chksum) {
/* Write superblock */
if (H5FD_write(f->shared->lf, H5FD_MEM_SUPER, dxpl_id,
f->shared->super_addr, superblock_size, sbuf) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write superblock")
/* Update checksum information if different */
f->shared->super_chksum = chksum;
} /* end if */
/* Check for driver info block */
if (HADDR_UNDEF != f->shared->driver_addr) {
/* Compute driver info block checksum */
assert(sizeof(chksum) == sizeof(f->shared->drvr_chksum));
for (p = (uint8_t *)&chksum, chksum = 0, i = 0; i < driver_size; ++i)
p[i % sizeof(f->shared->drvr_chksum)] ^= dbuf[i];
/* Compare with current checksums */
if (chksum != f->shared->drvr_chksum) {
/* Write driver information block */
if (H5FD_write(f->shared->lf, H5FD_MEM_SUPER, dxpl_id,
f->shared->base_addr + f->shared->driver_addr, driver_size, dbuf) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write driver information block")
/* Update checksum information if different */
f->shared->drvr_chksum = chksum;
} /* end if */
} /* end if */
/* Update the user's buffer, if given */
if (buf) {
HDmemcpy(buf, sbuf, superblock_size);
HDmemcpy(&buf[superblock_size], dbuf, driver_size);
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
}